Hi Scott
Some definitions may help you to understand the difference between waypoints, routes and tracks.http://gpstracklog.com/2005/12/tracks_and_rout.html
Try searching "difference between route and track" for more info.
Routes generally only work when on roads, if the map has auto-routing info (mapometers follow roads) it will add extra points, otherwise they straight line between waypoints. If you want to go off road you will need to use  the dont follow road button in mapometer and put points closer together.

To get the track into the Gps, export from mapometer as a track from the drop down box. Import into Basecamp, check properties of gpx file to make sure its less than 10000 points, if too large filter to less than 10000, send gpx to Gps from Basecamp.

All this can be done in Basecamp with an auto-routing map, Garmin Australia New Zealand topo ($) or the free NZ Open GPS Project maps, auto-routing road and free topomaps available, also available is custom topo50 maps - LINZ topo50 maps that look like the paper ones. http://gwprojects.org/forum/. You were riding with someone who had the custom topo50 maps in an Etrex20 at Le Petit Brevet.
Hopefully Scott Morris can work out a way of getting the LINZ topomaps into Topofusion, a great program but lack detailed NZ maps.

Let me know if you need any explained clearer.

What mapping programs and topomaps do you have? Some programs cant send Gpx files to the Etrex20/30, older version of memorymap can't. Garmin have changed the new Etrex communication with the computer.

Gary